Abstract
The paper presents the measurement method and values of the temperatures of the incoming and outgoing air obtained as a result of the connection and automation of 4 decentralized heat recovery ventilation units into one system, and the measured results of the thermal efficiency of the entire system. The built system consists of four single-room heat recovery devices, which are integrated into an automated system. The built-in sensors can be used to measure the average temperature of the ventilated rooms or the current temperature and relative humidity of the air flowing through the ventilation units, as well as the carbon dioxide level of the rooms. The units received automation that complements the original individual control elements, which is capable of complex control tasks from any computing device, graphic interface and Wi-Fi connection. The units' sensors, which can be moved into the air stream, are suitable for the momentary measurement of the parameters of the flowing air, thereby estimating the thermal efficiency of the entire system.
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